21000121301 has 16 divisors (see below), whose sum is σ = 22420644480. Its totient is φ = 19600627200.

The previous prime is 21000121297. The next prime is 21000121327. The reversal of 21000121301 is 10312100012.

It is a cyclic number.

It is not a de Polignac number, because 21000121301 - 2² = 21000121297 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000121391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1577210 + ... + 1590468.

It is an arithmetic number, because the mean of its divisors is an integer number (1401290280).

Almost surely, 2^21000121301 is an apocalyptic number.

It is an amenable number.

21000121301 is a deficient number, since it is larger than the sum of its proper divisors (1420523179).

21000121301 is a wasteful number, since it uses less digits than its factorization.

21000121301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14044.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 21000121301 its reverse (10312100012), we get a palindrome (31312221313).

The spelling of 21000121301 in words is "twenty-one billion, one hundred twenty-one thousand, three hundred one".